Evidence map›Paper›PMID 17938991›Full record

ArticleJournal of molecular evolution2007

Selection for antimicrobial peptide diversity in frogs leads to gene duplication and low allelic variation.

Jacob A Tennessen, Michael S Blouin

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Article in Journal of molecular evolution, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
5.1field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed, 63 citations in OpenAlex.

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  10. Unifying structural signature of eukaryotic α-helical host defense peptides.Proceedings of the National Academy of Sciences of the United States of America · 2019
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  12. The potential for adaptive maintenance of diversity in insect antimicrobial peptides.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2016
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Jacob A TennessenDepartment of Zoology, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331, USA. tennessj@science.oregonstate.edu
Michael S Blouin
Oregon State University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Antimicrobial peptides are highly diverse pathogen-killing molecules. In many taxa, their evolution is characterized by positive selection and frequent gene duplication. It has been proposed that genes encoding antimicrobial peptides might be subject to balancing selection and/or an enhanced mutation rate, but these hypotheses have not been well evaluated because allelic variation has rarely been studied at antimicrobial peptide loci. We present an evolutionary analysis of novel antimicrobial peptide genes from leopard frogs, Rana. Our results demonstrate that a single genome contains multiple homologous copies, among which there is an excess of nonsynonymous nucleotide site divergence relative to that expected from synonymous site divergence. Thus, we confirm the trends of recurrent duplication and positive selection. Allelic variation is quite low relative to interspecies divergence, indicating a recent positive selective sweep with no evidence of balancing selection. Repeated gene duplication, rather than a balanced maintenance of divergent allelic variants at individual loci, appears to be how frogs have responded to selection for a diverse suite of antimicrobial peptides. Our data also support a pattern of enhanced synonymous site substitution in the mature peptide region of the gene, but we cannot conclude that this is due to an elevated mutation rate.

Indexed as

AllelesGene DuplicationAmino Acid SequenceAnimalsAnti-Bacterial AgentsGenetic VariationMolecular Sequence DataPeptidesPhylogenyRanidaeSequence AlignmentAnti-Bacterial AgentsPeptides

Identifiers

PMID17938991
OpenAlexW2019272140

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.